Apparently all this was to assist in marketing, “If you know a person’s music preference you can tell what kind of person they are, who to sell to,” Professor North. I’d strongly advise Professor North to stick to the day job. Marketers can certainly tell the difference between Slipknot fans and Marillon fans and would not attempt to sell either of them The Sisters of Mercy’s fourth album which might yet rise phoenix-like from the ashes of their battle with East West Records. And what’s the surprise over the similarities between heavy metal and classical music fans? Didn’t he know Amy Lee of Evanescence is a trained classical pianist?